WO2022022621A1

WO2022022621A1 - Information transmission method and device

Info

Publication number: WO2022022621A1
Application number: PCT/CN2021/109164
Authority: WO
Inventors: 余雅威; 余健; 郭志恒; 陆绍中
Original assignee: 华为技术有限公司
Priority date: 2020-07-31
Filing date: 2021-07-29
Publication date: 2022-02-03

Abstract

An information transmission method and device, which are used to jointly configure DMRSs during a plurality of repeated transmission on the basis of frequency hopping so as to improve transmission performance. The method comprises: a network device determines first information and sends the first information to a terminal device, the first information being used to indicate a demodulation reference symbol (DMRS) resource configured in each repeated transmission among K repeated transmissions; and the terminal device performs the K repeated transmissions according to the DMRS resource configured for each repeated transmission in the first information. The DMRS resources configured in at least two repeated transmissions among the K repeated transmissions are different; and the configured DMRS resources each indicate the time domain position of the DMRS in one repeated transmission. As such, DMRS resources can be flexibly configured for a plurality of repeated transmissions, so that the performance gain of joint channel estimation can be obtained so as to improve transmission performance.

Description

An information transmission method and device

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese patent application with the application number 202010762089.0 and the application title "An Information Transmission Method and Device" filed with the China Patent Office on July 31, 2020, the entire contents of which are incorporated into this application by reference ;This application claims the priority of the Chinese patent application with the application number 202110053877.7 and the application name "An information transmission method and device" submitted to the Chinese Patent Office on January 15, 2021, the entire contents of which are incorporated into this application by reference middle.

technical field

The present application relates to the field of communication technologies, and in particular, to an information transmission method and device.

Background technique

In a wireless communication system, such as a new radio (new radio, NR) communication system, the information exchanged between a terminal device and an access device is carried through a physical channel. Among them, the data sent by the terminal equipment, that is, the uplink data, is usually carried through the physical uplink shared channel (PUSCH); the control information sent by the terminal equipment, that is, the uplink control information, is usually carried through the physical uplink control channel (physical uplink control channel, PUCCH) bearer. In addition, the terminal device can also send a sounding reference signal (SRS), and the access device can estimate the channel quality of the terminal device on different frequencies by receiving the SRS of the terminal device.

In wireless communication, for some deep coverage scenarios, such as cell edge or basement, the path loss of wireless signal propagation is very serious. In this case, coverage enhancement means need to be considered, which is particularly important for uplink transmission, because the transmit power of terminal equipment is often low, for example, 23dBm, which is much lower than that of access equipment (for example, a bandwidth of 20Mbit/s). Hertz (MHz) access equipment, its typical transmit power is 46dBm). A method to enhance coverage performance is to send data repeatedly, that is, repeat transmission. For example, the terminal device repeatedly sends PUSCH data, and the access device performs combined detection on the repeatedly sent data, which can improve channel estimation performance and data demodulation performance. , so as to improve the cell coverage.

In addition, in a rich scattering environment, when there are many transmission paths and the multipath delay spread is large, the coherence bandwidth of the subcarriers in the frequency domain is small. The fading channel within the bandwidth can be regarded as a quasi-static invariant fading channel. Therefore, when the coherence bandwidth is small, there may be relatively different fading at different carrier positions on the system bandwidth (outside the coherence bandwidth). Therefore, if the access device can screen out a better frequency domain location for frequency selective scheduling transmission based on the fading characteristics of different carrier locations, that is, frequency hopping transmission, it will help reduce the signal transmission loss caused by channel fading and improve the Uplink transmission capability.

Currently, frequency hopping for repeated transmissions is supported in NR. However, when repetitive transmission is currently performed based on frequency hopping, the configuration of a demodulation reference symbol (DMRS) for repetitive transmission is inflexible, resulting in poor transmission performance.

SUMMARY OF THE INVENTION

The present application provides an information transmission method and apparatus, which are used to jointly configure a DMRS during multiple repeated transmissions based on frequency hopping, so as to improve transmission performance.

In a first aspect, the present application provides an information transmission method, the method may include: a network device determines first information, and sends the first information to a terminal device; the first information is used to indicate that in K repeated transmissions every time The demodulation reference symbol DMRS resources configured in the repeated transmissions; the DMRS resources configured in at least two repeated transmissions in the K repeated transmissions are different; wherein, the configured DMRS resources indicate the DMRS in one repeated transmission. Time domain location; K is an integer greater than or equal to 2.

Through the above method, it is possible to flexibly configure the DMRS resources for multiple repeated transmissions, so that the performance gain of the joint channel estimation can be obtained, so as to improve the transmission performance.

In a possible design, the network device sends second information to the terminal device, where the second information is used to indicate N frequency hopping positions during the K repeated transmissions, where N is greater than or equal to 2 Integer. In this way, the terminal device can perform frequency-hopping repetitive transmission based on the N frequency-hopping positions.

In a possible design, the second information indicates a frequency hopping offset, and the frequency hopping offset is used to determine the N frequency hopping positions; wherein, the frequency hopping position during the i-th repeated transmission It is related to the number of time domain symbols occupied by one transmission, the total number of symbols in a time slot, i, the number of transmissions between two consecutive frequency hopping, and the frequency hopping offset; wherein, i is greater than or equal to 1 , and an integer less than or equal to K.

Through the above method, the terminal device can perform repeated transmission with uniform frequency hopping based on the N frequency hopping positions determined by the frequency hopping offset.

In a possible design, the second information indicates multiple frequency hopping offsets, and the multiple frequency hopping offsets are used to determine the N frequency hopping positions. In this way, the terminal device can perform repeated transmission with uneven frequency hopping based on the N frequency hopping positions determined by the plurality of frequency hopping offsets.

In a possible design, each frequency hopping position of the N frequency hopping positions corresponds to H consecutive repeated transmissions. Wherein, H is an integer greater than or equal to 2, and K is greater than or equal to 2 times of H.

In a possible design, the K times of repeated transmissions include L groups of repeated transmissions, and each group of repeated transmissions in the first L-1 groups of repeated transmissions of the K times of repeated transmissions includes performing according to the N frequency hopping positions N times of transmissions, the last group of repeated transmissions of the K times of repeated transmissions includes M times of transmissions according to the N frequency hopping positions, and the M is less than or equal to N; the L is greater than or equal to 2, and An integer less than or equal to K; the DMRS resources of the Pth group of repeated transmission configurations are different from the DMRS resources of the P+1th group of repeated transmission configurations; the P is an integer greater than 1 and less than L; the configured DMRS resources indicate the following One of the items: the time domain position of the pre-DMRS in one repeated transmission; the DMRS is not included in one repeated transmission; the time domain position of the pre-DMRS in one repeated transmission, and the time domain position of the additional DMRS in one repeated transmission . In this way, the DMRS resources of the adjacent two groups can be made different through flexible configuration, so as to obtain the performance gain of the joint channel estimation, so as to improve the transmission performance.

In a possible design, in the P-th group of repeated transmissions, the DMRS resources configured in each repeated transmission are the first DMRS resources; in the P+1-th group of repeated transmissions, the DMRS resources configured in each repeated transmission are The resource is the second DMRS resource. In this way, the DMRS resources configured for repeated transmission in each group are the same, and the configuration is relatively simple.

In a possible design, the K times of repeated transmissions include L groups of repeated transmissions, and each group of repeated transmissions in the first L-1 groups of repeated transmissions of the K times of repeated transmissions includes performing according to the N frequency hopping positions N times of transmissions, the last group of repeated transmissions of the K times of repeated transmissions includes M times of transmissions according to the N frequency hopping positions, and the M is less than or equal to N; the L is greater than or equal to 2, and An integer less than or equal to K; at least one of the L groups of repeated transmissions uses at least two configured DMRS resources; the configured DMRS resources indicate one of the following: when the preamble DMRS is in one repeated transmission Domain position; no DMRS is included in one repeated transmission; the time domain position of the preamble DMRS in one repeated transmission, and the time domain position of the additional DMRS in one repeated transmission. In this way, the DMRS resources configured by repeated transmission within a group are not identical, so that the performance gain of the joint channel estimation can be obtained, so as to improve the transmission performance.

In a possible design, the difference between the DMRS resources configured for the Pth group of repeated transmissions and the DMRS resources of the P+1th group of repeated transmissions includes: in the Pth group of repeated transmissions, a location in the first frequency domain The repeated transmission of , is different from the DMRS resources configured for the repeated transmission at the first frequency domain position in the P+1th group of repeated transmissions. In this way, in the repeated transmission of two consecutive groups, the DMRS resources configured for the repeated transmission at the same frequency domain location are different, so that the performance gain of the joint channel estimation can be obtained, so as to improve the transmission performance.

In a possible design, using at least two DMRS resource configurations for at least one group of repeated transmissions in the L groups of repeated transmissions includes: DMRS resources are different. In this way, the DMRS resources can be jointly configured from different repeated transmissions in the dimension of the frequency hopping frequency domain, so as to obtain the performance gain of the joint channel estimation, so as to improve the transmission performance.

In a possible design, each of the N frequency hopping positions corresponds to H consecutive repeated transmissions, and at least two of the H repeated transmissions have different DMRS resources configured for repeated transmission; wherein H is an integer greater than or equal to 2, and K is greater than or equal to twice H. In this way, the performance gain of the joint estimation of the channel can be obtained to improve the transmission performance.

In a second aspect, the present application provides an information transmission method, the method may include: a terminal device receiving first information from a network device, where the first information is used to indicate a demodulation reference symbol DMRS configured in K repeated transmissions resources; the DMRS resources configured in at least two repeated transmissions in the K repeated transmissions are different; wherein, the configured DMRS resources indicate the time domain position of the DMRS in one repeated transmission; the terminal device according to the The K repeated transmissions are performed on the DMRS resources configured for each repeated transmission in the first information; K is an integer greater than or equal to 2.

In a possible design, the terminal device receives second information from the network device, where the second information is used to indicate N frequency hopping positions during the K repeated transmissions, where N is greater than or equal to 2 Integer. In this way, the terminal device can perform frequency-hopping repetitive transmission based on the N frequency-hopping positions.

In a possible design, the second information indicates a frequency hopping offset, and the frequency hopping offset is used to determine the N frequency hopping positions; wherein, the frequency hopping position during the i-th repeated transmission It is related to the number of time domain symbols occupied by one transmission, the total number of symbols in a time slot, i, the number of transmissions between two consecutive frequency hopping, and the frequency hopping offset; where, i is greater than or equal to 1 , and an integer less than or equal to K.

In a possible design, the K times of repeated transmissions include L groups of repeated transmissions, and each group of repeated transmissions in the first L-1 groups of repeated transmissions of the K times of repeated transmissions includes performing according to the N frequency hopping positions N times of transmissions, the last group of repeated transmissions of the K times of repeated transmissions includes M times of transmissions according to the N frequency hopping positions, and the M is less than or equal to N; the L is greater than or equal to 2, and An integer less than or equal to K; at least one of the L groups of repeated transmissions uses at least two configured DMRS resources; the configured DMRS resources indicate one of the following: when the preamble DMRS is in one repeated transmission Domain position; DMRS is not included in one repeated transmission; the time domain position of the preamble DMRS in one repeated transmission, and the time domain position of the additional DMRS in one repeated transmission. In this way, the DMRS resources configured by repeated transmission within a group are not identical, so that the performance gain of the joint channel estimation can be obtained, so as to improve the transmission performance.

In a possible design, each of the N frequency hopping positions corresponds to H consecutive repeated transmissions, and at least two of the H repeated transmissions have different DMRS resources configured for repeated transmissions; wherein H is an integer greater than or equal to 2, and K is greater than or equal to twice H. In this way, the performance gain of the joint estimation of the channel can be obtained to improve the transmission performance.

In a third aspect, the present application further provides an information transmission apparatus, the information transmission apparatus may be network equipment, and the information transmission apparatus has the function of implementing the network equipment in the first aspect or each possible design example of the first aspect . The functions can be implemented by hardware, or by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above functions.

In a possible design, the structure of the information transmission apparatus may include a transceiver unit and a processing unit, and these units may perform the corresponding functions of the network device in the first aspect or each possible design example of the first aspect. For details, please refer to the method example The detailed description in , will not be repeated here.

In a possible design, the structure of the information transmission device includes a transceiver and a processor, and optionally also includes a memory, the transceiver is used to send and receive data, and to communicate and interact with other devices in the communication system, and the processor is used to send and receive data. It is configured to support the information transmission apparatus to perform the corresponding functions of the network device in the first aspect or each possible design example of the first aspect. The memory is coupled to the processor and holds program instructions and data necessary for the information transfer device.

In a fourth aspect, the present application also provides an information transmission apparatus, the information transmission apparatus may be a terminal device, and the information transmission apparatus has the function of implementing the terminal device in the second aspect or each possible design example of the second aspect . The functions can be implemented by hardware, or by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above functions.

In a possible design, the structure of the information transmission apparatus may include a transceiver unit and a processing unit, and these units may perform the corresponding functions of the terminal device in the second aspect or each possible design example of the second aspect. For details, see The detailed description in the method example will not be repeated here.

In a possible design, the structure of the information transmission device includes a transceiver and a processor, and optionally also includes a memory, and the transceiver is used to send and receive data, and to communicate and interact with other devices in the communication system. The device is configured to support the information transmission apparatus to perform the corresponding functions of the terminal device in the above-mentioned second aspect or each possible design example of the second aspect. The memory is coupled to the processor and holds program instructions and data necessary for the information transfer device.

In a fifth aspect, an embodiment of the present application provides a communication system, which may include the above-mentioned network equipment, terminal equipment, and the like.

In a sixth aspect, a computer-readable storage medium provided by an embodiment of the present application, the computer-readable storage medium stores a program instruction, and when the program instruction is executed on a computer, makes the computer execute the first aspect of the embodiment of the present application and its contents. A method of any possible design, the second aspect, and any possible design thereof. Illustratively, a computer-readable storage medium can be any available medium that can be accessed by a computer. Taking this as an example but not limited to: computer readable media may include non-transitory computer readable media, random-access memory (RAM), read-only memory (ROM), electrically erasable Except programmable read only memory (electrically EPROM, EEPROM), CD-ROM or other optical disk storage, magnetic disk storage medium or other magnetic storage device, or capable of carrying or storing desired program code in the form of instructions or data structures and capable of Any other media accessed by a computer.

In a seventh aspect, the embodiments of the present application provide a computer program product comprising computer program codes or instructions, which, when run on a computer, enables the computer to implement the first aspect and any possible design thereof, the second aspect and its Any possible design method.

In an eighth aspect, the present application also provides a chip, which is coupled to a memory and used to read and execute program instructions stored in the memory, so as to realize the above-mentioned first aspect and any possible designs thereof, the third Two aspects and any possible design method thereof.

For each aspect of the third aspect to the eighth aspect and the possible technical effect achieved by each aspect, please refer to the above description of the technical effect achieved by the various possible solutions in the first aspect or the second aspect, which will not be repeated here.

Description of drawings

1 is a schematic diagram of the architecture of a communication system provided by the present application;

2 is a schematic diagram of time domain resource allocation for Type A PUSCH repeated transmission provided by the present application;

Fig. 3 is the schematic diagram of a kind of Type B PUSCH repeated transmission across slot boundary provided by this application;

4 is a schematic diagram of repeated transmission of frequency hopping in a slot provided by the present application;

5 is a schematic diagram of repeated transmission of frequency hopping between slots provided by the present application;

6 is a flowchart of a method for information transmission provided by the present application;

FIG. 7 is a schematic diagram of a frequency hopping mode for repeated transmission of Type A PUSCH provided by the present application;

8 is a schematic diagram of another frequency hopping mode of Type A PUSCH repeated transmission provided by the present application;

9 is a schematic diagram of a frequency hopping mode during repeated transmission of a TypeB PUSCH provided by the present application;

10 is a schematic diagram of a frequency hopping manner during repeated transmission of another TypeB PUSCH provided by the application;

11 is a schematic diagram of a DMRS resource configured for TypeA PUSCH frequency hopping based repetitive transmission provided by the application;

12 is a schematic diagram of another TypeA PUSCH frequency hopping-based repetitive transmission configuration DMRS resource provided by the application;

13 is a schematic diagram of another TypeA PUSCH frequency hopping-based repetitive transmission configuration DMRS resource provided by the application;

14 is a schematic diagram of another TypeA PUSCH frequency hopping-based repetitive transmission configuration DMRS resource provided by the application;

15 is a schematic diagram of another TypeA PUSCH frequency hopping-based repetitive transmission configuration DMRS resource provided by the application;

16 is a schematic diagram of another TypeA PUSCH frequency hopping-based repetitive transmission configuration DMRS resource provided by the application;

17 is a schematic diagram of another TypeA PUSCH frequency hopping-based repetitive transmission configuration DMRS resource provided by the application;

18 is a schematic diagram of another TypeA PUSCH frequency hopping-based repeated transmission configuration DMRS resource provided by the application;

19 is a schematic diagram of another TypeA PUSCH frequency hopping-based repetitive transmission configuration DMRS resource provided by the application;

20 is a schematic diagram of another TypeA PUSCH frequency hopping-based repetitive transmission configuration DMRS resource provided by the application;

21 is a schematic diagram of another TypeA PUSCH frequency hopping-based repetitive transmission configuration DMRS resource provided by the application;

22 is a schematic structural diagram of an information transmission device provided by the application;

23 is a structural diagram of an information transmission device provided by the application;

FIG. 24 is a schematic diagram of a frequency hopping manner during repeated PUSCH transmission provided by this application.

detailed description

The present application will be described in further detail below with reference to the accompanying drawings.

Embodiments of the present application provide an information transmission method and apparatus, which are used to jointly configure a DMRS during multiple repeated transmissions based on frequency hopping, so as to improve transmission performance. The methods and devices described in this application are based on the same technical concept. Since the methods and devices have similar principles for solving problems, the implementations of the devices and methods can be referred to each other, and repeated descriptions will not be repeated here.

In the description of this application, words such as "first" and "second" are only used for the purpose of distinguishing and describing, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order.

In this application, "at least one" means one or more, and a plurality means two or more.

In order to describe the technical solutions of the embodiments of the present application more clearly, the information transmission method and apparatus provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows the architecture of a possible communication system to which the information transmission method provided by the embodiment of the present application is applicable. The architecture of the communication system includes a network device and a terminal device, wherein:

The network device is a device with a wireless transceiver function or a chip that can be arranged on the network device, and the network device may include but not limited to: access network device, base station (gNB), radio network controller (radio network controller, RNC) ), Node B (Node B, NB), base station controller (BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), Baseband unit (BBU), access point (AP), wireless relay node, wireless backhaul node, transmission point (transmission and reception point, TRP) in wireless fidelity (wireless fidelity, WIFI) systems Or transmission point, TP), etc., and can also be a network node that constitutes a gNB or a transmission point, such as a baseband unit (BBU), or a distributed unit (distributed unit, DU), etc.

In some deployments, a gNB may include a centralized unit (CU) and a DU. The gNB may also include a radio unit (RU). CU implements some functions of gNB, DU implements some functions of gNB, for example, CU implements radio resource control (radio resource control, RRC), packet data convergence protocol (packet data convergence protocol, PDCP) layer functions, DU implements wireless chain The functions of the road control (radio link control, RLC), media access control (media access control, MAC) and physical (physical, PHY) layers. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, therefore, under this architecture, higher-layer signaling, such as RRC layer signaling or PHCP layer signaling, can also It is considered to be sent by DU, or, sent by DU+RU. It can be understood that the network device may be a CU node, or a DU node, or a device including a CU node and a DU node. In addition, the CU may be divided into network equipment in the access network RAN, and the CU may also be divided into network equipment in the core network CN, which is not limited.

The terminal equipment may also be referred to as user equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device , user agent or user device. The terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal equipment, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation security ( Wireless terminals in transportation safety), wireless terminals in smart cities, wireless terminals in smart homes, and so on. The embodiments of the present application do not limit application scenarios. In this application, a terminal device with a wireless transceiver function and a chip that can be installed in the aforementioned terminal device are collectively referred to as a terminal device.

It should be noted that the communication system shown in FIG. 1 may be, but is not limited to, a fifth generation (5th Generation, 5G) system, such as NR. Optionally, the methods in the embodiments of the present application are also applicable to various future communication systems, such as a 6G system or other communication networks.

In the following, in order to facilitate the understanding of the embodiments of the present application, the concepts and basic knowledge involved in the embodiments of the present application are first introduced.

The current NR protocol supports uplink repeated transmission, that is, the terminal equipment, such as UE, sends data repeatedly, and the network equipment, such as gNB, receives and combines the repeatedly sent data, improves the signal-to-noise ratio of the received signal, and effectively improves the channel estimation capability. and demodulation performance, thereby improving the coverage of the cell.

1. Signaling configuration for repeated transmission

For example, for uplink SRS, the current NR protocol supports {1, 2, 4} different times of repeated transmission; for PUSCH transmission, the current NR protocol supports {1, 2, 4, 8} different times of repeated transmission. Currently, the number of repeated transmissions of SRS and PUSCH is configured through radio resource control (RRC) signaling, for example:

PUSCH can be configured through RRC fields (repK, repK-RV): ConfiguredGrantConfig::RepK={n1,n2,n4,n8}.

The SRS can be configured through the RRC field (RepetitionFactor): SRS-Resource::RepetitionFactor={n1,n2,n4}.

After the UE receives the above-mentioned RRC signaling configuration, it performs transmission of the corresponding number of repetitions.

Usually, RRC also includes many processes such as connection management, radio bearer control, and connection mobility. It takes a long time (for example, 100 milliseconds) for RRC signaling to be transmitted from the upper layer to the terminal, so it cannot flexibly and dynamically adapt to the transmission channel. Variety. Therefore, in the 38.214 protocol in the subsequent NR, the downlink control information (DCI) is introduced for the PUSCH to dynamically indicate the number of repeated transmissions of the PUSCH to flexibly match the channel quality of the current PUSCH transmission. Specifically, the number of repeated transmissions is determined by an index of a time domain resource allocation (TDRA) table in the DCI.

Therefore, the number of repeated transmissions of the current PUSCH can be determined by DCI indication (dynamic scheduling and grant-free scheduling of Type 2 PUSCH) or RepK of the RRC message (license-free scheduling of Type 1).

2. Repeated transmission of Type A and Type B

In the current NR system, two types of repetitive transmission are supported for PUSCH: Type A and Type B repetitive transmission; and only Type A repetition is supported for PUCCH. Taking PUSCH as an example, the repeated transmission of TypeA and TypeB is introduced as follows:

Repeated transmission of Type A: In R15, the transmission of a PUSCH is not allowed to cross the slot boundary, so in order to avoid the transmission of PUSCH across the slot boundary, the UE can pass the uplink (uplink, UL) grant (grant) in consecutive available slots. ) or RRC signaling with the repeated transmission of PUSCH, which is called PUSCH repetition type A (PUSCH repetition type A), wherein the time domain resources of the repeated transmission of PUSCH in each slot are the same (reserved). For example, the schematic diagram of time domain resource allocation for Type A PUSCH repeated transmission shown in Figure 2.

Repeated transmission of TypeB: In R16, the Rel-16 protocol adds PUSCH repetition type B (PUSCH repetition typeB). For PUSCH repetition typeB, the time domain resource sllocation (TDRA) field in DCI or the TDRA parameter in type1 grant-free scheduling indicates the first "nominal" repeated resource, the remaining time for repeated transmissions The domain resource is calculated based on the time domain resource of the first PUSCH and the UL/downlink (downlink, DL) time slot configuration. If a "nominal" transmission crosses a slot boundary or DL/UL switch point, the "nominal" transmission is split into multiple PUSCH repetitions at the slot boundary or switch point, so the actual number of repetitions may be greater than the indicated value. For example, the schematic diagram of Type B PUSCH repeated transmission across the slot boundary shown in Figure 3 shows that "automatic cutting" occurs when crossing the slot boundary.

3. The current NR protocol supports frequency hopping for repeated transmission: frequency hopping within a slot and frequency hopping between slots.

Taking PUSCH as an example, when PUSCH is scheduled by DCI format 0_2 (DCI format 0_2), the indication of frequency hopping is indicated by the RRC parameter PUSCH-config (PUSCH-config)::frequency Hopping (frequencyHopping)-forDCIFormat0_2; when PUSCH is scheduled by other formats When scheduled by the DCI, it is indicated by PUSCH::frequencyHopping.

Usually, the network device configures the candidate frequency hopping offset (frequency HoppingOffset) through RRC high-layer signaling, that is, the terminal device performs a certain offset (offset) offset according to the frequency domain position of the previous transmission.

Currently, terminal equipment supports frequency hopping within a slot and frequency hopping between slots. There are two frequency hopping locations. The frequency hopping pattern (pattern) can be shown in Figure 4 and shown in Figure 5. Schematic diagram of repeated transmission of frequency hopping between slots.

Taking PUCCH transmission as an example, the current NR protocol supports PUCCH format1/3/4 configuration slot repetition (slot repetition), and the number of repetitions is configured through RRC signaling;

The time-domain resource configuration of the PUCCH slot repetition is similar to the PUSCH repetition of TypeA, that is, the repetition is performed at the same time-domain symbol position occupied by each slot on consecutive multiple slots, and the number of time-domain symbols occupied by each slot is passed. RRC signaling configuration;

When the PUCCH is repeated, only frequency hopping can be performed between slots, that is, the PUCCH of the odd-numbered slot and the even-numbered slot are located at two different carrier frequency positions.

When the UE determines that the number of time domain symbols available in the current slot is less than the length occupied by the configured PUCCH, it does not send the PUCCH in the current slot.

As mentioned above, the current NR protocol supports too few frequency hopping positions, that is, after a given offset, there are only two frequency hopping positions within and between slots. Therefore, the gain of frequency selective scheduling may not be fully utilized. In addition, in the current repeated transmission, for example, in the repeated transmission based on frequency hopping, the same DMRS configuration is used for multiple repeated transmissions, that is, the pilot density or position of the DMRS in the multiple repeated transmission and The configuration is not flexible enough, resulting in poor transmission performance.

Based on the above problems, the present application proposes an information transmission method, which considers the joint configuration of DMRS during multiple repeated transmissions (based on frequency hopping) during joint channel estimation, which can improve transmission performance, and can perform multiple transmissions within and between slots. Frequency hopping at each frequency domain location, so as to make full use of the gain of frequency selective scheduling.

An information transmission method provided by an embodiment of the present application is applicable to the communication system shown in FIG. 1 . Referring to Figure 6, the specific flow of the method may include:

Step 601: The network device determines first information, where the first information is used to indicate the DMRS resources configured in each repeated transmission in the K repeated transmissions; the DMRS configured in at least two repeated transmissions in the K repeated transmissions The resources are different; wherein, the configured DMRS resource indicates the time domain position of the DMRS in one repeated transmission; K is an integer greater than or equal to 2.

Specifically, the time domain position can be represented by the start position and the number of occupied symbols; the time domain position can also be represented by the end position and the number of occupied symbols; the time domain position can also be represented by the start position and the end position, which is not limited in this application.

Step 602: The network device sends first information to the terminal device, that is, the terminal device receives the first information from the network device.

Step 603: The terminal device performs the K repeated transmissions according to the DMRS resources configured for each repeated transmission in the first information.

In an optional implementation manner, the network device further sends second information to the terminal device, where the second information is used to indicate N frequency hopping positions during the K repeated transmissions, where N is greater than or an integer equal to 2. In this way, the terminal device can perform frequency-hopping repetitive transmission based on the N frequency-hopping positions.

In an optional implementation manner, the second information indicates a frequency hopping offset (offset), and the frequency hopping offset is used to determine the N frequency hopping positions. The frequency hopping offset is an offset relative to the first frequency hopping position. Since the second information only indicates one frequency hopping offset, it may indicate that the terminal device performs uniform frequency hopping, that is, two frequency hopping intervals corresponding to two consecutive frequency hopping are the same. In this case, the second information may also indicate the number of frequency hopping, so as to determine the N frequency hopping positions.

Specifically, in the case where the terminal equipment performs uniform frequency hopping, the frequency hopping position of the i-th repeated transmission, the number of time domain symbols occupied by one transmission, the total number of symbols in a time slot, i, the number of consecutive two hops The number of transmissions between frequencies and the frequency hopping offset are related; wherein, i is an integer greater than or equal to 1 and less than or equal to K. Exemplarily, the frequency hopping position during each repeated transmission may conform to the following formula 1:

Among them, RB _start 1 is the frequency hopping position during repeated transmission, RB _start is the first frequency hopping position during repeated transmission, _ld is the number of time domain symbols occupied by one transmission, and the total number of symbols in one time slot is 14, i, k0 are the number of transmissions between two consecutive frequency hopping, and RB _offset is the frequency hopping offset.

For example, when k0 is 1, based on the above formula 1, the frequency hopping position of each repeated transmission can be obtained, which can conform to the following formula 2:

For another example, when k0 is 2, based on the above formula 1, the frequency hopping position of each repeated transmission can be obtained, which can conform to the following formula 3:

In another optional implementation manner, the second information indicates multiple frequency hopping offsets, and the multiple frequency hopping offsets are used to determine the N frequency hopping positions. Wherein, any frequency hopping offset is an offset relative to the first frequency hopping position. By indicating multiple frequency hopping offsets, the second information may indicate that the terminal device performs uneven frequency hopping, that is, two frequency hopping intervals corresponding to two consecutive frequency hopping are different. Exemplarily, in the case of uneven frequency hopping, the frequency hopping position during each repeated transmission may conform to the following formula 4:

Wherein, RB _start 2 is the frequency hopping position during repeated transmission, RB _offset1 , RB _offset2 , ..., RB _offsetN are the multiple frequency hopping offsets, and here are N frequency hopping offsets.

Specifically, it can be determined through the above formula 4 that the corresponding frequency hopping position can be obtained through each frequency hopping offset, that is to say, the corresponding multiple hopping positions can be obtained based on the multiple frequency hopping offsets indicated by the second information. frequency location.

In an optional implementation manner, each of the N frequency hopping positions corresponds to H consecutive repeated transmissions, where H is an integer greater than or equal to 2, and K is greater than or equal to 2 of H times. That is to say, frequency hopping is performed every H repeated transmissions.

The specific manner of repeated transmission of frequency hopping is illustrated below by using a specific example. Taking the repeated transmission of PUSCH as an example, assuming that K=8 repeated transmissions are performed, and the number of time-domain symbols scheduled for a single transmission is 1 _d =3, then N=4 frequency hopping at different frequency hopping positions can be performed. During transmission, a frequency hopping is performed at intervals of k0 transmissions.

For example, when the value of k0 is 1 and 2, the frequency hopping pattern (pattern) can be as shown in FIG. 7 and FIG. 8 , respectively. 7 and 8 both illustrate the repeated transmission of Type A PUSCH as an example. In Figure 7, four repeated transmissions can be performed in a slot, and adjacent repeated transmissions are all frequency-hopping; a total of 8 repeated transmissions are performed in two slots, and adjacent repeated transmissions are all frequency-hopping. There are at most 4 candidate frequency hopping positions. In Figure 8, 4 repeated transmissions can be performed in the slot, and 2 repeated transmissions are performed at every interval (that is, the above-mentioned case of H=2) for frequency hopping; frequency hopping for repeated transmissions. There are at most 4 candidate frequency hopping positions.

For another example, the above premise is also applicable to TypeB repeated transmission. Compared with TypeA repeated transmission, TypeB repeated transmission does not limit the time domain position of the PUSCH repeated transmission between slots must be the same. In TypeB repeated transmission, it can be Across slot boundaries, multiple repeat transmissions are sent consecutively. For example, when k0 is 1 and 2, the frequency hopping pattern (pattern) when the TypeB PUSCH is repeatedly transmitted may be as shown in FIG. 9 and FIG. 10 , respectively. When multiple repeated transmissions are continuously sent across the slot boundary, the fifth repeated transmission as shown in Figure 9 and Figure 10 will be split into two repeated transmissions (the fifth repeated transmission becomes the fifth and sixth repeated transmissions). repeated transmissions), so the terminal device will actually perform 9 repeated transmissions, but the total number of time-domain symbols occupied by the repeated transmissions remains unchanged.

The example shown above describes that when the number of time-domain symbols of the PUSCH in a single transmission is I _d =3, frequency hopping at four different frequency hopping positions can be performed. In addition, when the number of time-domain symbols of PUSCH in a single transmission is 1 _d =4, frequency hopping at three different frequency hopping positions can be performed; or when the number of time-domain symbols of PUSCH in a single transmission is 1 _d =5,6 , 7, you can perform frequency hopping in two different frequency domain positions. And in addition to the above k0 values of 1 and 2, k0 can also have other values, such as 3, 4...etc. When the time domain symbols of the single transmission of the PUSCH are different, and the value of k0 is different, the frequency hopping mode types can be referred to each other, and will not be listed one by one in this application. The repeated transmission times k0 without frequency hopping and the number N of frequency hopping candidate positions can satisfy: mod(K, k0*N)=0, that is, the repeated transmission times are an integral multiple of k0*N.

Through the above method, more frequency hopping positions (including uniform and non-uniform frequency hopping offsets) are added during repeated transmission, so that better frequency diversity gain can be achieved in a frequency selective fading channel.

Further, when performing K repeated transmissions, the terminal device may perform the K repeated transmissions based on the above-mentioned frequency hopping manner or frequency hopping rule. And the DMRS resources configured in at least two repeated transmissions in the K repeated transmissions are different. Several possible examples of the DMRS resources configured in K repeated transmissions are described in detail below.

In an optional implementation manner, the K times of repeated transmissions may include L groups of repeated transmissions, and each group of repeated transmissions in the first L-1 groups of repeated transmissions of the K times of repeated transmissions includes N times of transmission performed at the frequency hopping position, the last group of repeated transmissions of the K repeated transmissions includes M times of transmission according to the N frequency hopping positions, and the M is less than or equal to N; the L is greater than or An integer equal to 2 and less than or equal to K; wherein, each group of repeated transmissions may also be referred to as repeated transmissions of each round of frequency hopping.

Wherein, the DMRS resources of the Pth group of repeated transmission configurations are different from the DMRS resources of the P+1th group of repeated transmission configurations; the P is an integer greater than 1 and less than L; the configured DMRS resources may indicate one of the following: Time domain position of front-loaded DMRS in one repeated transmission; DMRS not included in one repeated transmission; time domain position of front-loaded DMRS in one repeated transmission, and additional DMRS in one repeated transmission time domain location.

In an example, in the P-th group of repeated transmissions, the DMRS resources configured in each repeated transmission are the first DMRS resources; in the P+1-th group of repeated transmissions, the DMRS resources configured in each repeated transmission are is the second DMRS resource. That is, in this example, the DMRS resources configured for all the repeated transmissions in the P-th group of repeated transmissions are the same, and the DMRS resources for all the repeated transmissions in the P+1-th group of repeated transmissions are configured with the same DMRS resources.

For example, when the k0 value of frequency hopping is 1 after repeated transmission interval k0 repetitions, when the number of time-domain symbols scheduled for a single repeated transmission is 1 _d =3, the TypeA PUSCH based on the frequency hopping repeated transmission configuration DMRS resources It can be shown in Figure 11. In FIG. 11 , the DMRS configured in each repeated transmission of the first round of frequency hopping (the 1st to 4th repeated transmissions) (which can also be regarded as the P-th repeated transmission) is the first DMRS resource. Exemplarily, Each repeated transmission contains 1 front-loaded DMRS, that is, the first DMRS resource indicates the time domain position of the front-loaded DMRS in the corresponding repeated transmission; in the second round of frequency hopping (the 5th to 8th repeated transmissions) (It can also be regarded as the P+1th group of repeated transmissions) The DMRS configured in each repeated transmission is the second DMRS resource. Exemplarily, each repeated transmission does not contain DMRS, and the different frequency domains of the previous slot are multiplexed. The result of the location channel estimation.

Specifically, the time domain position indicated by the DMRS resource configured in each repeated transmission in the first round of frequency hopping in FIG. 11 can be flexibly configured according to a predefined position. For example, the DMRS occupies the first time domain symbol, and can be updated Perform channel estimation in a timely manner; or DMRS can be placed at the position of the middle time-domain symbol currently scheduled to more accurately estimate the channels of other time-domain symbols; or DMRS can be placed at the position of the last time-domain symbol currently scheduled , so that it can be more accurately applied to the channel estimation of the next slot when the channel estimation is performed jointly with the next slot (without DMRS).

For another example, when the repeated transmission interval k0 repeats the frequency hopping k0 value is 1, when the number of time-domain symbols scheduled for a single repeated transmission is 1 _d =4, the TypeA PUSCH based on the frequency hopping repeated transmission configuration DMRS Resources can be shown in Figure 12. Wherein, the first DMRS resource in FIG. 12 may indicate that each repeated transmission includes one front-loaded DMRS occupying one time-domain symbol (for example, it may be the first time-domain symbol), and the second DMRS resource may indicate that each repetition The transmission does not contain DMRS. When the DMRS is not included in each repeated transmission, the channel estimation results of other slots are multiplexed.

For another example, when the k0 value of frequency hopping is 1 after repeated transmission interval k0 repetitions, when the number of time-domain symbols _ld = 5, 6, and 7 scheduled for single repeated transmission, TypeA PUSCH repeats based on frequency hopping. The DMRS resources of the transmission configuration may be as shown in FIG. 13 . Wherein, the first DMRS resource in FIG. 13 may indicate that each repeated transmission contains 1 front-loaded DMRS and 1 additional DMRS, a total of 2 time domain symbols. Exemplarily, the front-loaded DMRS may occupy the first time domain For symbols, the additional DMRS may occupy any time-domain symbol after the first time-domain symbol; the second DMRS resource may indicate that each repeated transmission does not contain DMRS. When the DMRS is not included in each repeated transmission, the channel estimation results of other slots are multiplexed.

For another example, when the k0 value of frequency hopping is 1 after repeated transmission interval k0 repetitions, when the number of time-domain symbols _ld = 5, 6, and 7 scheduled for single repeated transmission, TypeA PUSCH repeats based on frequency hopping. The DMRS resources of the transmission configuration may also be as shown in FIG. 14 . Wherein, the first DMRS resource in FIG. 14 may indicate that each repeated transmission contains 1 front-loaded DMRS and 1 additional DMRS, with a total of 2 time domain symbols. Exemplarily, the front-loaded DMRS may occupy the first time domain symbol, the additional DMRS can occupy any time domain symbol after the first time domain symbol; the second DMRS resource can indicate that each repeated transmission contains one occupied time domain symbol (for example, it can be the first time domain symbol ) front-loaded DMRS.

It should be noted that when the DMRS resource indication configured in the above-mentioned repeated transmission includes DMRS, the time-domain symbol occupied by the DMRS may not only be one time-domain symbol, but also the number of time-domain symbols occupied is only an example. For example, the DMRS time domain position may be the previous time domain symbol, the middle time domain symbol, and the last time domain symbol that occupy the currently scheduled repeated transmission, and can be flexibly configured, which is not limited in this application.

Specifically, the DMRS resources of the configurations of _ld =3, _ld =4 and _ld =5, 6, and 7 mentioned above, compared with the DMRS resources configured for repeated transmission in the existing protocol in Table 1, can be pre-defined by redefining For the DMRS resources configured in Table 2, the time domain position of the DMRS in one repeated transmission is indicated by the DMRS resources configured in Table 2.

Table 1

Table 2

In another example, the difference between the DMRS resources configured for the P-th repeated transmission and the DMRS resources configured for the P+1-th repeated transmission may be: a position in the first frequency domain in the P-th repeated transmission The DMRS resources configured for the repeated transmission at the first frequency domain position in the repeated transmission in the P+1th group of repeated transmissions are different. That is, in two consecutive groups of repeated transmissions, the DMRS resources configured for repeated transmissions at the same frequency domain location are different.

For example, when the k0 value of frequency hopping is 1 after repeated transmission interval k0 repetitions, when the number of time-domain symbols scheduled for a single repeated transmission is 1 _d =3, the TypeA PUSCH based on the frequency hopping repeated transmission configuration DMRS resources It can be shown in Figure 15. In FIG. 15 , the DMRS resources configured in the repeated transmission at the same frequency domain position (ie, the same frequency hopping offset position) in two consecutive groups are different. For example: the first repeated transmission (set in the P-th group) and the fifth repeated transmission (set in the P+1-th group) are configured in the same frequency domain position that the first repeated transmission includes DMRS, and the fifth repeated transmission includes DMRS. The second repeated transmission does not include DMRS; the second repeated transmission (set in the P-th group) and the sixth repeated transmission (set in the P+1-th group) are configured as the second repeated transmission at the same frequency domain position. Contains DMRS, and repeat 6 contains DMRS.

For another example, when the repeated transmission interval k0 repeats the frequency hopping k0 value is 1, when the number of time-domain symbols scheduled for a single repeated transmission is 1 _d =4, the TypeA PUSCH based on the frequency hopping repeated transmission configuration DMRS Resources can be shown in Figure 16. In FIG. 16 , the DMRS resources configured in the repeated transmission at the same frequency domain position (ie, the same frequency hopping offset position) in two consecutive groups are different. For example: the first repeated transmission (set in the P-th group) and the fourth repeated transmission (set in the P+1-th group) are configured in the same frequency domain position that the first repeated transmission includes DMRS, and the fourth repeated transmission includes DMRS. The second repeated transmission does not include DMRS; the second repeated transmission (set in the P-th group) and the fifth repeated transmission (set in the P+1-th group) are configured as the second repeated transmission at the same frequency domain position. DMRS was included, and the 5th repetition included DMRS.

For another example, when the k0 value of frequency hopping is 1 after repeated transmission interval k0 repetitions, when the number of time-domain symbols _ld = 5, 6, and 7 scheduled for single repeated transmission, TypeA PUSCH repeats based on frequency hopping. The DMRS resources of the transmission configuration may be as shown in FIG. 17 or FIG. 18 . In FIG. 17 or FIG. 18 , the DMRS resources configured in the repeated transmission at the same frequency domain position (that is, the same frequency hopping offset position) in two consecutive groups are different. For example: in Fig. 17, the first repeated transmission (set in the P-th group) and the third repeated transmission (set in the P+1-th group) are configured in the same frequency domain position so that the first repeated transmission includes 2 DMRS, the 3rd repeated transmission does not include DMRS; in Figure 18, the 1st repeated transmission (set in the P-th group) and the 3rd repeated transmission (set in the P+1-th group) are in the same frequency. The domain position is configured such that the first repetition includes 2 DMRSs, and the third repetition includes 1 DMRS. Wherein, when a DMRS is included in any repeated transmission, the included start position (and/or end position) of the DMRS and the number of occupied time domain symbols are not limited in this application.

It should be noted that, when the DMRS resource indication configured in the above-mentioned repeated transmission includes DMRS, the time domain symbol occupied by the DMRS may not only be one time domain symbol, and the number of time domain symbols occupied is not limited. For example, the time domain position of the DMRS may be the preceding time domain symbol, the time domain symbol of time, and the last time domain symbol of the currently scheduled repeated transmission, which may be flexibly configured, which is not limited in this application.

Specifically, the DMRS resources of the configurations of _ld =3, _ld =4 and _ld =5, 6, and 7 involved in the above example can be pre-defined as the DMRS resources of the configurations in Table 3, and the DMRS resources of the configurations in Table 2 can be redefined. The DMRS resource configured in the DMRS indicates the time domain position of the DMRS in one repeated transmission.

table 3

In an optional implementation manner, similarly, the K times of repeated transmissions may include L groups of repeated transmissions, and each group of repeated transmissions in the first L-1 groups of repeated transmissions of the K times of repeated transmissions includes N times of transmission performed at the N frequency hopping positions, the last group of repeated transmissions of the K times of repeated transmissions includes M times of transmission according to the N frequency hopping positions, and the M is less than or equal to N; the L is an integer greater than or equal to 2 and less than or equal to K.

Wherein, at least one of the L groups of repeated transmissions uses at least two configured DMRS resources; the configured DMRS resources indicate one of the following: the time domain position of the pre-DMRS in one repeated transmission; one repeated The transmission does not include DMRS; the time domain position of the preamble DMRS in one repeated transmission, and the time domain position of the additional DMRS in one repeated transmission.

In an example, the at least two DMRS resource configurations used in at least one of the L groups of repeated transmissions may specifically be: repeated transmission configurations in at least two different frequency domain locations in the at least one group of repeated transmissions DMRS resources are different. That is, the DMRS resources are jointly configured from repeated transmissions that are different in the dimension of the frequency hopping frequency domain. For example, the DMRS resources configured for the first repeated transmission are different from the DMRS resources configured for the second repeated transmission.

For example, the DMRS resources configured by at least one group of repeated transmissions shown in FIG. 15 to FIG. 18 for repeated transmissions at at least two different frequency domain positions may also be different. For example, in FIG. 15, in the first group of repeated transmissions, the repeated transmissions in the first frequency domain position include DMRS, and the repeated transmissions in the second frequency domain position do not include DMRS; in FIG. 16, in the first group of repeated transmissions , the repeated transmission at the first frequency domain position includes DMRS, and the repeated transmission at the second frequency domain position does not include DMRS; in Figure 17, in the first group of repeated transmissions, the repeated transmission at the first frequency domain position includes 2 DMRS, the repeated transmission at the second frequency domain position does not contain DMRS; in Figure 18, in the first group of repeated transmissions, the repeated transmission at the first frequency domain position contains 2 DMRS, and the second frequency domain position Repeated transmissions on 1 include 1 DMRS.

Further, the above-mentioned FIG. 15-FIG. 18 can show the repeated transmission of the first round of frequency hopping, and the repeated transmission in different frequency domain positions is jointly configured with DMRS resources, for example: more DMRS-less DMRS-multiple DMRS; second In the repeated transmission of round hopping, DMRS resources are jointly configured with multiple repeated transmissions in the same frequency domain position in the first round of frequency hopping, for example: more DMRS-less DMRS-multiple DMRS. 15-18 show that the DMRS resources configured for repeated transmission within the same group are different, and the DMRS resources configured for repeated transmission between consecutive two groups are also different.

In another optional implementation manner, each frequency hopping position of the N frequency hopping positions corresponds to consecutive H (ie k0) repeated transmissions, and there are at least two repeated transmissions in the H repeated transmissions The configured DMRS resources are different; wherein, H is an integer greater than or equal to 2, and K is greater than or equal to 2 times of H. That is, only one frequency hopping is performed every H repeated transmissions, and consecutive H repeated transmissions correspond to the same frequency hopping position.

In an example, a joint DMRS configuration is performed for H repeated transmissions at the same frequency hopping position, for example: in the H repeated transmissions, the previous repeated transmissions contain more DMRS, and the subsequent repeated transmissions contain less DMRS; or the middle repeated transmission contains more DMRSs; The repeated transmission contains more DMRS, and the previous and subsequent repeated transmissions contain less DMRS. That is, as long as the DMRS resources configured for at least two repeated transmissions in the H repeated transmissions are different, it is sufficient.

For example, when H=2, N=4, when the number of time-domain symbols scheduled for a single repetitive transmission is 1 _d =3, and K=8, the DMRS resources configured for TypeA PUSCH frequency hopping-based repetitive transmission can be as shown in FIG. 19 . . In FIG. 19 , there are 2 repeated transmissions at the same frequency hopping position, and the frequency hopping is followed by the 2 repeated transmissions, and there are 2 repeated transmissions at each frequency hopping position. The DMRS resources configured in the two repeated transmissions are different: the first repeated transmission corresponding to any frequency hopping position includes one DMRS, and the second repeated transmission does not include a DMRS.

For another example, when H=2, N=3, when the number of time-domain symbols scheduled for a single repetitive transmission is 1 _d =4, and K=8, the DMRS resources configured for TypeA PUSCH frequency hopping-based repetitive transmission can be as shown in FIG. 20 . Show. In Figure 20, there are 3 repeated transmissions at the same frequency hopping position, and the frequency hopping is followed by the 3 repeated transmissions, and there are 3 repeated transmissions at each frequency hopping position. Two of the three repeated transmissions have different DMRS resources: the first repeated transmission corresponding to any frequency hopping position contains a DMRS, the second repeated transmission does not contain DMRS, and the third repeated transmission DMRS is not included in the , that is, the first repeated transmission contains more DMRS (for example, one DMRS), and the subsequent repeated transmission contains less DMRS (for example, no DMRS). In addition, the repeated transmission in the middle can contain more DMRS (such as 1 DMRS), the repeated transmission at the beginning and the end contains less DMRS (such as no DMRS), and the specific time domain position of the DMRS contained in the repeated transmission can be flexibly configured , which is no longer shown in the figure.

For another example, for example, when H=2, N=2, when the number of time-domain symbols scheduled for a single repetitive transmission is 1 _d =5, 6, 7, and K=8, the TypeA PUSCH frequency hopping-based repetitive transmission is configured with DMRS Resources can be shown in Figure 21. In Figure 21, there are 2 repeated transmissions at the same frequency hopping position, and the frequency hopping is followed by the 2 repeated transmissions, and there are 2 repeated transmissions at each frequency hopping position. The DMRS resources configured in the two repeated transmissions are different: the first repeated transmission corresponding to any frequency hopping position includes one DMRS, and the second repeated transmission does not include a DMRS.

It should be noted that the above examples are all indications of the DMRS resources in the configuration of repeated transmission and frequency hopping in the case of TypeA repetition. Similarly, in TypeB repetition, it is only necessary to cross the slot boundary when the slot cross boundary is required, and the previous single repeated transmission needs to be transmitted twice when crossing the boundary, but it does not affect the configuration of DMRS resources. The configuration of DMRS resources can refer to The above examples are not listed one by one in this application.

It should be noted that the above-mentioned examples are only some examples of situations where the DMRS resources configured in at least two repeated transmissions in the K repeated transmissions are different, and cannot be used for at least two repeated transmissions in the K repeated transmissions in this application. The DMRS resources configured in are limited differently. There are many other situations, for example, in the K repeated transmissions, in the 1st to the Ath repeated transmission, the DMRS resource configured in each repeated transmission is the third DMRS resource, and in the A+1th to the Kth In the repeated transmission, the DMRS resource configured in each repeated transmission is the fourth DMRS resource; the A is an integer greater than 1 or less than K, wherein the third DMRS resource or the fourth DMRS resource may indicate one of the following: The time domain position of the preamble DMRS in one repeated transmission; the one repeated transmission does not include DMRS; the time domain position of the preamble DMRS in one repeated transmission, and the time domain position of the additional DMRS in one repeated transmission. Of course, there are other various examples, as long as the DMRS resources configured in at least two repeated transmissions in the K repeated transmissions are different, they may all be included in the information transmission method of the present application. This application will not list them one by one.

By using the information transmission method provided by the embodiments of the present application, it is possible to flexibly configure DMRS resources for multiple repeated transmissions, so that the performance gain of joint channel estimation can be obtained, so as to improve transmission performance.

Based on the above embodiments, the embodiments of the present application further provide an information transmission apparatus. Referring to FIG. 22 , the information transmission apparatus 2200 may include a transceiver unit 2201 and a processing unit 2202 . The transceiver unit 2201 is used for the information transmission device 2200 to receive information (message or data) or send information (message or data), and the processing unit 2202 is used to control and manage the actions of the information transmission device 2200 . The processing unit 2202 may also control the steps performed by the transceiving unit 2201 .

Exemplarily, the information transmission apparatus 2200 may be the network device in the above-mentioned embodiments, and specifically may be a processor in the network device, or a chip or a chip system, or a functional module, etc.; or, the information transmission apparatus 2200 may be the terminal device in the above-mentioned embodiment, and may specifically be a processor in the terminal device, or a chip or a chip system, or a functional module or the like.

In one embodiment, when the information transmission apparatus 2200 is used to implement the function of the network device in the above embodiment, it may specifically include:

The processing unit 2202 is configured to determine first information, where the first information is used to indicate the demodulation reference symbol DMRS resources configured in each repeated transmission in K repeated transmissions; at least twice in the K repeated transmissions The DMRS resources configured in repeated transmission are different; wherein, the configured DMRS resources indicate the time domain position of the DMRS in one repeated transmission; K is an integer greater than or equal to 2; the transceiver unit 2201 is used to send the terminal equipment Send the first message.

In an optional implementation manner, the transceiver unit 2201 is further configured to: send second information to the terminal device, where the second information is used to indicate N frequency hopping positions during the K repeated transmissions , and N is an integer greater than or equal to 2.

In an example, the second information indicates a frequency hopping offset, and the frequency hopping offset is used to determine the N frequency hopping positions; wherein, the frequency hopping position during the i-th repeated transmission is the same as the first frequency hopping position. The number of time domain symbols occupied by transmission, the total number of symbols in a time slot, i, the number of transmissions between two consecutive frequency hopping, and the frequency hopping offset correlation; where i is greater than or equal to 1, and An integer less than or equal to K.

In another example, the second information indicates multiple frequency hopping offsets, and the multiple frequency hopping offsets are used to determine the N frequency hopping positions.

In an optional implementation manner, the K times of repeated transmissions include L groups of repeated transmissions, and each group of repeated transmissions in the first L-1 groups of repeated transmissions of the K times of repeated transmissions includes the number of hops according to the N hops. The last group of repeated transmissions of the K repeated transmissions includes M times of transmissions performed according to the N frequency hopping positions, and the M is less than or equal to N; the L is greater than or equal to 2, and an integer less than or equal to K;

The DMRS resources of the P-th group of repeated transmission configurations are different from the DMRS resources of the P+1-th group of repeated transmission configurations; the P is an integer greater than 1 and less than L; the configured DMRS resources indicate one of the following: Preamble DMRS The time domain position in one repeated transmission; the one repeated transmission does not contain DMRS; the time domain position of the preamble DMRS in one repeated transmission, and the time domain position of the additional DMRS in one repeated transmission.

Specifically, in the P-th group of repeated transmissions, the DMRS resources configured in each repeated transmission are the first DMRS resources; in the P+1-th group of repeated transmissions, the DMRS resources configured in each repeated transmission are the second DMRS resources DMRS resources.

In another optional implementation manner, the K times of repeated transmissions include L groups of repeated transmissions, and each group of repeated transmissions in the first L-1 groups of repeated transmissions of the K times of repeated transmissions includes the number of hops according to the N hops. The last group of repeated transmissions of the K repeated transmissions includes M times of transmissions performed according to the N frequency hopping positions, and the M is less than or equal to N; the L is greater than or equal to 2, and an integer less than or equal to K;

At least one of the L groups of repeated transmissions uses at least two configured DMRS resources; the configured DMRS resources indicate one of the following: the time domain position of the preamble DMRS in one repeated transmission; Does not include DMRS; the time domain position of the preamble DMRS in one repeated transmission, and the time domain position of the additional DMRS in one repeated transmission.

Exemplarily, the difference between the DMRS resources of the Pth group of repeated transmission configurations and the DMRS resources of the P+1th group of repeated transmission configurations includes: repeated transmissions at the first frequency domain position in the Pth group of repeated transmissions It is different from the DMRS resource configured for the repeated transmission at the first frequency domain position in the P+1th group of repeated transmissions.

Optionally, using at least two types of DMRS resource configurations for at least one group of repeated transmissions in the L groups of repeated transmissions includes: the repeated transmission configurations in at least two different frequency domain positions in the at least one group of repeated transmissions have different DMRS resources. .

In yet another optional embodiment, each of the N frequency hopping positions corresponds to consecutive H repeated transmissions, and at least two of the H repeated transmissions have different DMRS resources configured for repeated transmission; Wherein, H is an integer greater than or equal to 2, and K is greater than or equal to 2 times of H.

In another embodiment, when the information transmission apparatus 2200 is used to implement the functions of the terminal device in the foregoing embodiment, it may specifically include:

The transceiver unit 2201 is configured to receive first information from a network device, where the first information is used to indicate the demodulation reference symbol DMRS resources configured in K repeated transmissions; at least two repeated transmissions in the K repeated transmissions The DMRS resources configured in are different; wherein, the configured DMRS resources indicate the time domain position of the DMRS in one repeated transmission; K is an integer greater than or equal to 2; the processing unit 2202 is configured to The K repeated transmissions are performed for the DMRS resources configured for each repeated transmission in the information.

In an optional implementation manner, the transceiver unit 2201 is further configured to: receive second information from the network device, where the second information is used to indicate N frequency hopping positions during the K repeated transmissions , and N is an integer greater than or equal to 2.

It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and other division methods may be used in actual implementation. Each functional unit in the embodiments of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The integrated unit, if implemented in the form of a software functional unit and sold or used as an independent product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, and the computer software products are stored in a storage medium , including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .

This embodiment of the present application further provides another information transmission apparatus, as shown in FIG. 23 , the information transmission apparatus 2300 may include a transceiver 2301 and a processor 2302 . Optionally, the information transmission apparatus 2300 may further include a memory 2303 . The memory 2303 may be disposed inside the information transmission device 2300 or outside the information transmission device 2300 . The processor 2302 can control the transceiver 2301 to receive and transmit data or information.

Specifically, the processor 2302 may be a central processing unit (CPU), a network processor (NP), or a combination of CPU and NP. The processor 2302 may further include hardware chips. The above-mentioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The above-mentioned PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general-purpose array logic (generic array logic, GAL) or any combination thereof.

The transceiver 2301, the processor 2302 and the memory 2303 are connected to each other. Optionally, the transceiver 2301, the processor 2302 and the memory 2303 are connected to each other through a bus 2304; the bus 2304 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) ) bus, etc. The bus can be divided into address bus, data bus, control bus and so on. For ease of presentation, only one thick line is shown in FIG. 23, but it does not mean that there is only one bus or one type of bus.

In an optional implementation manner, the memory 2303 is used to store programs and the like. Specifically, the program may include program code, the program code including computer operation instructions. Memory 2303 may include RAM, and may also include non-volatile memory, such as one or more disk memories. The processor 2302 executes the application program stored in the memory 2303 to realize the above-mentioned functions, thereby realizing the functions of the information transmission device 2300 .

Exemplarily, the information transmission apparatus 2300 may be the above-mentioned network equipment and terminal equipment.

In one embodiment, when the information transmission apparatus 2300 is used to implement the functions of the network device in the foregoing embodiment, it may specifically include:

The processor 2302 is configured to determine first information, where the first information is used to indicate the demodulation reference symbol DMRS resources configured in each repeated transmission in the K repeated transmissions; at least twice in the K repeated transmissions The DMRS resources configured in repeated transmission are different; wherein, the configured DMRS resources indicate the time domain position of the DMRS in one repeated transmission; K is an integer greater than or equal to 2; the transceiver 2301 is used to send the terminal equipment Send the first message.

In an optional implementation manner, the transceiver 2301 is further configured to: send second information to the terminal device, where the second information is used to indicate N frequency hopping positions during the K repeated transmissions , and N is an integer greater than or equal to 2.

Optionally, using at least two types of DMRS resource configurations for at least one group of repeated transmissions in the L groups of repeated transmissions includes: the repeated transmission configurations in at least two different frequency domain positions in the at least one group of repeated transmissions have different DMRS resources .

In another embodiment, when the information transmission apparatus 2300 is used to implement the functions of the terminal device in the foregoing embodiment, it may specifically include:

The transceiver 2301 is configured to receive first information from a network device, where the first information is used to indicate a demodulation reference symbol DMRS resource configured in K repeated transmissions; at least two repeated transmissions in the K repeated transmissions The DMRS resources configured in are different; wherein, the configured DMRS resources indicate the time domain position of the DMRS in one repeated transmission; K is an integer greater than or equal to 2; the processor 2302 is configured to The K repeated transmissions are performed for the DMRS resources configured for each repeated transmission in the information.

In an optional implementation manner, the transceiver 2301 is further configured to: receive second information from the network device, where the second information is used to indicate N frequency hopping positions during the K repeated transmissions , and N is an integer greater than or equal to 2.

In addition, in two adjacent repeated transmissions (ie, transmissions) in the current solution, when frequency hopping is performed, due to the different positions of the frequency domain resources, such as shown in FIG. 4 , joint channel estimation cannot be performed. Based on this, the embodiments of the present application also provide an information transmission method, which can perform joint channel estimation for at least two adjacent repeated transmissions.

Specifically, a time domain granularity (that is, the number of time slots included in a time domain unit) Z is defined in K repeated transmissions, that is, time slots 1 to Z use the same frequency domain resources, and time slots Z+1 to 2Z Use frequency domain resources after frequency hopping. Exemplarily, the terminal device performs inter-group frequency hopping based on a time-domain granularity Z, each group (group) includes Z time slots (slots), and the repeated transmission of Z slots in each group transmission, using the same transmission power.

In an example, taking PUSCH repeated transmission as an example, it is assumed that the time-domain granularity of the configured inter-group frequency hopping is Z=2, and when four repeated transmissions are performed, the terminal equipment repeats the transmission frequency hopping according to the method in the prior art The schematic diagram of the mode may be shown in (a) of FIG. 24 . Using the above method provided by the embodiment of the present application, the schematic diagram of the frequency hopping mode of repeated transmission by the terminal device may be shown in (b) of FIG. 24 .

It can be seen that in (a) of FIG. 24, two adjacent repeated transmissions, such as the first and second repeated transmissions, correspond to different frequency hopping positions, that is, the corresponding frequency domain resources are different. In (b) of Figure 24, two adjacent repeated transmissions correspond to the same frequency hopping position, that is, the corresponding frequency domain resources are the same. For example, the first and second repeated transmissions correspond to the same frequency domain resources. , the third and fourth repeated transmissions after frequency hopping occur correspond to the same frequency domain resources.

In (b) of Figure 24, repeated transmissions are divided into two groups, the first and second repeated transmissions are grouped together, and the third and fourth repeated transmissions are grouped together to achieve inter-group frequency hopping, The transmit power of the two repeated transmissions in the same group can be the same, and the antenna ports sent by the terminal device can be the same, so that the network device can perform joint channel estimation and demodulation on the received uplink signal, which helps to improve the uplink performance.

It should be noted that the above-mentioned FIG. 24 only takes Z=2 as an example for illustrative description. Of course, Z may also have other values, which will not be listed one by one in this application.

In an example, the existing frequency hopping position of each repeated transmission satisfied by (a) in FIG. 24 may conform to the following formula five:

in,

Indicates the slot number,

for

The corresponding frequency hopping position, RB _start is the first frequency hopping position during repeated transmission, RB _offset is the frequency hopping offset,

is the number of resource blocks (RBs) contained in the bandwidth part (BWP),

Indicates that the starting position of the RB of the current transmission schedule, RB _start , is _hopped to the new RB position with the frequency hopping interval _RB _offset . , to ensure that the RB position after frequency hopping is still within the current BWP range.

Further, using the method provided by the embodiment of the present application, the frequency hopping position of each repeated transmission satisfied by (b) in FIG. 24 may conform to the following formula 6:

Using the information transmission method provided by the embodiment of the present application, a time domain granularity is introduced during repeated transmission to perform frequency hopping between groups, so that joint channel estimation can be performed for multiple repeated transmissions in the same group, and transmission performance is improved.

Based on the above embodiments, the embodiments of the present application provide a communication system, and the communication system may include network devices, terminal devices, and the like involved in the above embodiments.

Embodiments of the present application further provide a computer-readable storage medium, where the computer-readable storage medium is used to store a computer program, and when the computer program is executed by a computer, the computer can implement the information transmission method provided by the above method embodiments.

Embodiments of the present application further provide a computer program product, where the computer program product is used to store a computer program, and when the computer program is executed by a computer, the computer can implement the information transmission method provided by the above method embodiments.

An embodiment of the present application further provides a chip, where the chip is coupled to a memory, and the chip is used to implement the information transmission method provided by the above method embodiments.

An embodiment of the present application further provides a chip system, where the chip system includes a processor, which is configured to support the above-mentioned information transmission apparatus to realize the above-mentioned functions. Optionally, the chip system further includes a memory for storing necessary program instructions and data of the information transmission device. The chip system may be composed of chips, or may include chips and other discrete devices.

As will be appreciated by those skilled in the art, the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the present application. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the protection scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

An information transmission method, comprising:

The network device determines first information, where the first information is used to indicate the demodulation reference symbol DMRS resources configured in each repeated transmission in the K repeated transmissions; the configuration in at least two repeated transmissions in the K repeated transmissions The DMRS resources are different; wherein, the configured DMRS resources indicate the time domain position of the DMRS in one repeated transmission; K is an integer greater than or equal to 2;

The network device sends the first information to the terminal device.
The method of claim 1, wherein the method further comprises:

The network device sends second information to the terminal device, where the second information is used to indicate N frequency hopping positions during the K repeated transmissions, where N is an integer greater than or equal to 2.
The method of claim 2, wherein the second information indicates a frequency hopping offset, and the frequency hopping offset is used to determine the N frequency hopping positions;

Among them, the frequency hopping position during the i-th repeated transmission, the number of time domain symbols occupied by one transmission, the total number of symbols in a time slot, i, the number of transmissions between two consecutive frequency hopping, the frequency hopping offset Shift correlation; where i is an integer greater than or equal to 1 and less than or equal to K.
The method of claim 2, wherein the second information indicates multiple frequency hopping offsets, and the multiple frequency hopping offsets are used to determine the N frequency hopping positions.
The method according to any one of claims 2 to 4, wherein the K repeated transmissions comprise L groups of repeated transmissions, and each group in the first L-1 groups of repeated transmissions of the K repeated transmissions is repeated The transmission includes N transmissions according to the N frequency hopping positions, and the last group of repeated transmissions of the K repeated transmissions includes M transmissions according to the N frequency hopping positions, where M is less than or equal to N ; The L is an integer greater than or equal to 2 and less than or equal to K;

The DMRS resources of the P-th group of repeated transmission configurations are different from the DMRS resources of the P+1-th group of repeated transmission configurations; the P is an integer greater than 1 and less than L; the configured DMRS resources indicate one of the following: Preamble DMRS The time domain position in one repeated transmission; the one repeated transmission does not contain DMRS; the time domain position of the preamble DMRS in one repeated transmission, and the time domain position of the additional DMRS in one repeated transmission.
The method according to claim 5, wherein, in the P-th group of repeated transmissions, the DMRS resources configured in each repeated transmission are the first DMRS resources; and in the P+1-th group of repeated transmissions, each time The DMRS resource configured in the repeated transmission is the second DMRS resource.
The method according to any one of claims 2 to 5, wherein the K repeated transmissions comprise L groups of repeated transmissions, and each group in the first L-1 groups of repeated transmissions of the K repeated transmissions is repeated The transmission includes N transmissions according to the N frequency hopping positions, and the last group of repeated transmissions of the K repeated transmissions includes M transmissions according to the N frequency hopping positions, where M is less than or equal to N ; The L is an integer greater than or equal to 2 and less than or equal to K;

At least one of the L groups of repeated transmissions uses at least two configured DMRS resources; the configured DMRS resources indicate one of the following: the time domain position of the preamble DMRS in one repeated transmission; Does not include DMRS; the time domain position of the preamble DMRS in one repeated transmission, and the time domain position of the additional DMRS in one repeated transmission.
The method according to claim 5, wherein the difference between the DMRS resources of the Pth group of repeated transmission configurations and the DMRS resources of the P+1th group of repeated transmission configurations includes:

The repeated transmission at the first frequency domain position in the P-th group of repeated transmissions is different from the DMRS resources configured for the repeated transmission at the first frequency-domain position in the P+1th group of repeated transmissions.
The method according to claim 7, wherein using at least two DMRS resource configurations for at least one group of repeated transmissions in the L groups of repeated transmissions comprises:

The DMRS resources configured for the repeated transmissions at at least two different frequency domain positions in the at least one group of repeated transmissions are different.
The method according to any one of claims 2-5, wherein each frequency hopping position of the N frequency hopping positions corresponds to consecutive H repeated transmissions, and at least two of the H repeated transmissions The DMRS resources configured for repeated transmission are different; wherein, H is an integer greater than or equal to 2, and K is greater than or equal to 2 times of H.
An information transmission method, comprising:

The terminal device receives first information from the network device, where the first information is used to indicate the demodulation reference symbol DMRS resources configured in K repeated transmissions; the DMRS resources configured in at least two repeated transmissions in the K repeated transmissions different; wherein, the configured DMRS resource indicates the time domain position of the DMRS in one repeated transmission; K is an integer greater than or equal to 2;

The terminal device performs the K repeated transmissions according to the DMRS resources configured for each repeated transmission in the first information.
The method of claim 11, wherein the method further comprises:

The terminal device receives second information from the network device, where the second information is used to indicate N frequency hopping positions during the K repeated transmissions, where N is an integer greater than or equal to 2.
The method of claim 12, wherein the second information indicates a frequency hopping offset, and the frequency hopping offset is used to determine the N frequency hopping positions;

Among them, the frequency hopping position during the i-th repeated transmission, the number of time domain symbols occupied by one transmission, the total number of symbols in a time slot, i, the number of transmissions between two consecutive frequency hopping, the frequency hopping offset Shift correlation; where i is an integer greater than or equal to 1 and less than or equal to K.
The method of claim 12, wherein the second information indicates multiple frequency hopping offsets, and the multiple frequency hopping offsets are used to determine the N frequency hopping positions.
The method according to any one of claims 12 to 14, wherein the K repeated transmissions comprise L groups of repeated transmissions, and each group in the first L-1 groups of repeated transmissions of the K repeated transmissions is repeated The transmission includes N transmissions according to the N frequency hopping positions, and the last group of repeated transmissions of the K repeated transmissions includes M transmissions according to the N frequency hopping positions, where M is less than or equal to N ; The L is an integer greater than or equal to 2 and less than or equal to K;

The DMRS resources of the P-th group of repeated transmission configurations are different from the DMRS resources of the P+1-th group of repeated transmission configurations; the P is an integer greater than 1 and less than L; the configured DMRS resources indicate one of the following: Preamble DMRS The time domain position in one repeated transmission; the one repeated transmission does not contain DMRS; the time domain position of the preamble DMRS in one repeated transmission, and the time domain position of the additional DMRS in one repeated transmission.
The method according to claim 15, wherein, in the P-th group of repeated transmissions, the DMRS resources configured in each repeated transmission are the first DMRS resources; and in the P+1-th group of repeated transmissions, each time The DMRS resource configured in the repeated transmission is the second DMRS resource.
The method according to any one of claims 12 to 15, wherein the K repeated transmissions include L groups of repeated transmissions, and each group in the first L-1 groups of repeated transmissions of the K repeated transmissions is repeated The transmission includes N transmissions according to the N frequency hopping positions, and the last group of repeated transmissions of the K repeated transmissions includes M transmissions according to the N frequency hopping positions, where M is less than or equal to N ; The L is an integer greater than or equal to 2 and less than or equal to K;

At least one of the L groups of repeated transmissions uses at least two configured DMRS resources; the configured DMRS resources indicate one of the following: the time domain position of the preamble DMRS in one repeated transmission; Does not include DMRS; the time domain position of the preamble DMRS in one repeated transmission, and the time domain position of the additional DMRS in one repeated transmission.
The method according to claim 15, wherein the difference between the DMRS resources of the P-th repeated transmission configuration and the DMRS resources of the P+1-th repeated transmission configuration comprises:

The repeated transmission at the first frequency domain position in the P-th group of repeated transmissions is different from the DMRS resources configured for the repeated transmission at the first frequency-domain position in the P+1th group of repeated transmissions.
The method according to claim 17, wherein, using at least two DMRS resource configurations for at least one group of repeated transmissions in the L groups of repeated transmissions comprises:

The DMRS resources configured for the repeated transmissions at at least two different frequency domain positions in the at least one group of repeated transmissions are different.
The method according to any one of claims 12 to 15, wherein each frequency hopping position of the N frequency hopping positions corresponds to consecutive H repeated transmissions, and there are at least two of the H repeated transmissions The DMRS resources configured for repeated transmission are different; wherein, H is an integer greater than or equal to 2, and K is greater than or equal to 2 times of H.
An information transmission device, characterized in that it includes:

a processing unit, configured to determine first information, where the first information is used to indicate the demodulation reference symbol DMRS resources configured in each repeated transmission in K repeated transmissions; at least two repeated transmissions in the K repeated transmissions The DMRS resources configured in are different; wherein, the configured DMRS resources indicate the time domain position of the DMRS in one repeated transmission; K is an integer greater than or equal to 2;

The transceiver unit is used for sending the first information to the terminal device.
The device of claim 21, wherein the transceiver unit is further configured to:

Send second information to the terminal device, where the second information is used to indicate N frequency hopping positions during the K repeated transmissions, where N is an integer greater than or equal to 2.
The apparatus of claim 22, wherein the second information indicates a frequency hopping offset, and the frequency hopping offset is used to determine the N frequency hopping positions;

Among them, the frequency hopping position during the i-th repeated transmission, the number of time domain symbols occupied by one transmission, the total number of symbols in a time slot, i, the number of transmissions between two consecutive frequency hopping, the frequency hopping offset Shift correlation; where i is an integer greater than or equal to 1 and less than or equal to K.
The apparatus of claim 22, wherein the second information indicates multiple frequency hopping offsets, and the multiple frequency hopping offsets are used to determine the N frequency hopping positions.
The apparatus according to any one of claims 22 to 24, wherein the K repeated transmissions comprise L groups of repeated transmissions, and each group in the first L-1 groups of repeated transmissions of the K repeated transmissions is repeated The transmission includes N transmissions according to the N frequency hopping positions, and the last group of repeated transmissions of the K repeated transmissions includes M transmissions according to the N frequency hopping positions, where M is less than or equal to N ; The L is an integer greater than or equal to 2 and less than or equal to K;

The DMRS resources of the P-th group of repeated transmission configurations are different from the DMRS resources of the P+1-th group of repeated transmission configurations; the P is an integer greater than 1 and less than L; the configured DMRS resources indicate one of the following: Preamble DMRS The time domain position in one repeated transmission; the one repeated transmission does not contain DMRS; the time domain position of the preamble DMRS in one repeated transmission, and the time domain position of the additional DMRS in one repeated transmission.
The apparatus according to claim 25, wherein, in the P-th group of repeated transmissions, the DMRS resources configured in each repeated transmission are the first DMRS resources; and in the P+1-th group of repeated transmissions, each time The DMRS resource configured in the repeated transmission is the second DMRS resource.
The apparatus according to any one of claims 22 to 25, wherein the K repeated transmissions comprise L groups of repeated transmissions, and each group in the first L-1 groups of repeated transmissions of the K repeated transmissions is repeated The transmission includes N transmissions according to the N frequency hopping positions, and the last group of repeated transmissions of the K repeated transmissions includes M transmissions according to the N frequency hopping positions, where M is less than or equal to N ; The L is an integer greater than or equal to 2 and less than or equal to K;

At least one of the L groups of repeated transmissions uses at least two configured DMRS resources; the configured DMRS resources indicate one of the following: the time domain position of the preamble DMRS in one repeated transmission; Does not include DMRS; the time domain position of the preamble DMRS in one repeated transmission, and the time domain position of the additional DMRS in one repeated transmission.
The apparatus of claim 25, wherein the difference between the DMRS resources of the P-th repeated transmission configuration and the DMRS resources of the P+1-th repeated transmission configuration comprises:

The repeated transmission at the first frequency domain position in the P-th group of repeated transmissions is different from the DMRS resources configured for the repeated transmission at the first frequency-domain position in the P+1th group of repeated transmissions.
The apparatus of claim 27, wherein at least one of the L groups of repeated transmissions using at least two DMRS resource configurations comprises:

The DMRS resources configured for the repeated transmissions at at least two different frequency domain positions in the at least one group of repeated transmissions are different.
The apparatus according to any one of claims 22-25, wherein each frequency hopping position of the N frequency hopping positions corresponds to consecutive H repeated transmissions, and there are at least two of the H repeated transmissions The DMRS resources configured for repeated transmission are different; wherein, H is an integer greater than or equal to 2, and K is greater than or equal to 2 times of H.
An information transmission device, characterized in that it includes:

A transceiver unit, configured to receive first information from a network device, where the first information is used to indicate the demodulation reference symbol DMRS resources configured in K repeated transmissions; configured in at least two repeated transmissions in the K repeated transmissions The DMRS resources are different; wherein, the configured DMRS resources indicate the time domain position of the DMRS in one repeated transmission; K is an integer greater than or equal to 2;

A processing unit, configured to perform the K repeated transmissions according to the DMRS resources configured for each repeated transmission in the first information.
The device of claim 31, wherein the transceiver unit is further configured to:

Second information is received from the network device, where the second information is used to indicate N frequency hopping positions during the K repeated transmissions, where N is an integer greater than or equal to 2.
The apparatus of claim 32, wherein the second information indicates a frequency hopping offset, and the frequency hopping offset is used to determine the N frequency hopping positions;

Among them, the frequency hopping position during the i-th repeated transmission, the number of time domain symbols occupied by one transmission, the total number of symbols in a time slot, i, the number of transmissions between two consecutive frequency hopping, the frequency hopping offset Shift correlation; where i is an integer greater than or equal to 1 and less than or equal to K.
The apparatus of claim 32, wherein the second information indicates multiple frequency hopping offsets, and the multiple frequency hopping offsets are used to determine the N frequency hopping positions.
The apparatus according to any one of claims 32 to 34, wherein the K repeated transmissions comprise L groups of repeated transmissions, and each group in the first L-1 groups of repeated transmissions of the K repeated transmissions is repeated The transmission includes N transmissions according to the N frequency hopping positions, and the last group of repeated transmissions of the K repeated transmissions includes M transmissions according to the N frequency hopping positions, where M is less than or equal to N ; The L is an integer greater than or equal to 2 and less than or equal to K;

The DMRS resources of the P-th group of repeated transmission configurations are different from the DMRS resources of the P+1-th group of repeated transmission configurations; the P is an integer greater than 1 and less than L; the configured DMRS resources indicate one of the following: Preamble DMRS The time domain position in one repeated transmission; the one repeated transmission does not contain DMRS; the time domain position of the preamble DMRS in one repeated transmission, and the time domain position of the additional DMRS in one repeated transmission.
The apparatus according to claim 35, wherein, in the P-th group of repeated transmissions, the DMRS resources configured in each repeated transmission are the first DMRS resources; and in the P+1-th group of repeated transmissions, each time The DMRS resource configured in the repeated transmission is the second DMRS resource.
The apparatus according to any one of claims 32 to 35, wherein the K repeated transmissions comprise L groups of repeated transmissions, and each group in the first L-1 groups of repeated transmissions of the K repeated transmissions is repeated The transmission includes N transmissions according to the N frequency hopping positions, and the last group of repeated transmissions of the K repeated transmissions includes M transmissions according to the N frequency hopping positions, where M is less than or equal to N ; The L is an integer greater than or equal to 2 and less than or equal to K;

At least one of the L groups of repeated transmissions uses at least two configured DMRS resources; the configured DMRS resources indicate one of the following: the time domain position of the preamble DMRS in one repeated transmission; Does not include DMRS; the time domain position of the preamble DMRS in one repeated transmission, and the time domain position of the additional DMRS in one repeated transmission.
The apparatus of claim 35, wherein the difference between the DMRS resources of the P-th repeated transmission configuration and the DMRS resources of the P+1-th repeated transmission configuration comprises:

The repeated transmission at the first frequency domain position in the P-th group of repeated transmissions is different from the DMRS resources configured for the repeated transmission at the first frequency-domain position in the P+1th group of repeated transmissions.
The apparatus of claim 37, wherein at least one of the L groups of repeated transmissions using at least two DMRS resource configurations comprises:

The DMRS resources configured for the repeated transmissions at at least two different frequency domain positions in the at least one group of repeated transmissions are different.
The apparatus according to any one of claims 32-35, wherein each frequency hopping position of the N frequency hopping positions corresponds to consecutive H repeated transmissions, and there are at least two of the H repeated transmissions The DMRS resources configured for repeated transmission are different; wherein, H is an integer greater than or equal to 2, and K is greater than or equal to 2 times of H.
A computer-readable storage medium, characterized in that, the computer-readable storage medium stores program instructions, when the program instructions are executed on a device, the device is made to perform as described in any one of claims 1 to 20. method described.